The UK's Competition Appeal Tribunal rules that a class action lawsuit against Google over allegations of abusing its dominance in digital ads can proceed
this time in London Tom Jowitt / Silicon UK : Google Must Face $17 Billion Adtech Lawsuit, Tribunal Rules The Mirror : Google faces £13.6billion legal claim over ‘anti-competitive’ advertising tech Rob Harkavy / CDR Magazine : Multi-billion pound adtech claim against Google to proceed Invezz / Investing.com : Google's $17 billion lawsuit to proceed in the UK, CAT rules Frank Prenesti / Sharecast : Google must face £13.6bn lawsuit over advertising, court rules Damien Geradin / Geradin Partners : Geradin Partners represents class representative in successful certification of Google Ad Tech class action See also Mediagazer
Context & Ripple Effects
The certification gives a UK procedural foothold to a claim alleging that Google’s position across ad-tech services harmed competition. It follows a broader pattern in which a US court also allowed an advertisers’ antitrust case against Google to continue, while narrowing some claims focused on tools used by large advertisers: a parallel US advertiser case moved forward on a narrower footing.
The case became more consequential as UK competition authorities later challenged Google’s ad-tech conduct, and European publishers subsequently pursued damages claims. Together, those developments put private recovery claims alongside regulatory scrutiny of the same market structure: the CMA’s ad-tech competition objections and European publishers’ later damages claim.
First-order effects
- The proposed class action can proceed in the UK tribunal, requiring Google to defend the alleged ad-tech conduct through the next stages rather than ending the case at certification.
- The class representative represented by Geradin Partners gains a court-approved vehicle to pursue the reported multibillion-pound damages claim; the ruling does not determine liability or damages.
Second-order effects
- Certification increases the practical litigation exposure around Google’s ad-tech operations, adding a private claimant route to the regulatory questions later raised by the CMA.
- Other claimants affected by ad-tech market conduct have a clearer example of a UK collective-action path, while Google must manage overlapping legal theories across jurisdictions.
Third-order effects
- If courts continue to admit collective claims over platform intermediation, private damages actions could become a more durable complement to competition-agency enforcement in digital markets.
- The combination of regulator findings and follow-on claimant actions may shift competition disputes from fines alone toward longer-running questions of compensation and market access, though outcomes remain dependent on proof at trial.
The trend: Digital-platform antitrust enforcement is increasingly being reinforced by collective private claims seeking damages from allegedly exclusionary market conduct.